HSS Journal

, Volume 1, Issue 1, pp 31–34

Early Follow-up for a Hybrid Total Hip Arthroplasty Using a Metal-Backed Acetabular Component Designed to Reduce “Backside” Polyethylene Wear

  • Colin E. Poole
  • Shantanu S. Patil
  • Darryl D. D’Lima
  • Clifford W. ColwellJr
Original Article

DOI: 10.1007/s11420-005-0102-6

Cite this article as:
Poole, C.E., Patil, S.S., D’Lima, D.D. et al. HSS Jrnl (2005) 1: 31. doi:10.1007/s11420-005-0102-6

Abstract

Modular acetabular systems have several advantages; however, increased polyethylene wear has been recognized as a disadvantage. In our study, an acetabular shell design with a highly polished inner surface, a locking mechanism that minimizes micromotion, and a high polyethylene liner to shell conformity was evaluated. A prospective cohort of 50 consecutive hips was followed up for a mean of 3.6 years (range, 2–7 years). One patient required an early revision for recurrent instability. Mean linear head penetration rates were 0.242 mm/year (range, 0.048–0.655 mm/year). The true linear wear rate was calculated after subtracting the linear wear in the first follow-up year from the total wear at the end of the follow-up. The true linear wear rate was 0.173 mm/year (range, 0.03–0.423 mm/year). A positive correlation was found between wear rate and male gender. The low head penetration rates suggest that a polished liner with an improved locking mechanism and increased liner conformity can reduce polyethylene wear.

Keywords

total hipar throplasty polyethylene wear backside wear clinical outcomes radiographic outcomes 

Copyright information

© Hospital for Special Surgery 2005

Authors and Affiliations

  • Colin E. Poole
    • 1
  • Shantanu S. Patil
    • 1
  • Darryl D. D’Lima
    • 1
  • Clifford W. ColwellJr
    • 1
  1. 1.Shiley Center for Orthopaedic Research and Education at Scripps ClinicLa JollaUSA

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